lint: [move-only] Move text related lints to text_format.rs

diff --git a/test/lint/test_runner/src/lint_text_format.rs b/test/lint/test_runner/src/lint_text_format.rs
new file mode 100644
index 00000000..ca51e6db
--- /dev/null
+++ b/test/lint/test_runner/src/lint_text_format.rs
@@ -0,0 +1,159 @@
+// Copyright (c) The Bitcoin Core developers
+// Distributed under the MIT software license, see the accompanying
+// file COPYING or https://opensource.org/license/mit/.
+
+use std::fs::File;
+use std::io::{Read, Seek, SeekFrom};
+
+use crate::util::{check_output, commit_range, get_pathspecs_default_excludes, git, LintResult};
+
+/// Return the pathspecs for whitespace related excludes
+fn get_pathspecs_exclude_whitespace() -> Vec<String> {
+    let mut list = get_pathspecs_default_excludes();
+    list.extend(
+        [
+            // Permanent excludes
+            "*.patch",
+            "src/qt/locale",
+            "contrib/windeploy/win-codesign.cert",
+            "doc/README_windows.txt",
+            // Temporary excludes, or existing violations
+            "contrib/init/bitcoind.openrc",
+            "contrib/macdeploy/macdeployqtplus",
+            "src/crypto/sha256_sse4.cpp",
+            "src/qt/res/src/*.svg",
+            "test/functional/test_framework/crypto/ellswift_decode_test_vectors.csv",
+            "test/functional/test_framework/crypto/xswiftec_inv_test_vectors.csv",
+            "contrib/qos/tc.sh",
+            "contrib/verify-commits/gpg.sh",
+            "src/univalue/include/univalue_escapes.h",
+            "src/univalue/test/object.cpp",
+            "test/lint/git-subtree-check.sh",
+        ]
+        .iter()
+        .map(|s| format!(":(exclude){s}")),
+    );
+    list
+}
+
+pub fn lint_trailing_whitespace() -> LintResult {
+    let trailing_space = git()
+        .args(["grep", "-I", "--line-number", "\\s$", "--"])
+        .args(get_pathspecs_exclude_whitespace())
+        .status()
+        .expect("command error")
+        .success();
+    if trailing_space {
+        Err(r#"
+Trailing whitespace (including Windows line endings [CR LF]) is problematic, because git may warn
+about it, or editors may remove it by default, forcing developers in the future to either undo the
+changes manually or spend time on review.
+
+Thus, it is best to remove the trailing space now.
+
+Please add any false positives, such as subtrees, Windows-related files, patch files, or externally
+sourced files to the exclude list.
+            "#
+        .trim()
+        .to_string())
+    } else {
+        Ok(())
+    }
+}
+
+pub fn lint_trailing_newline() -> LintResult {
+    let files = check_output(
+        git()
+            .args([
+                "ls-files", "--", "*.py", "*.cpp", "*.h", "*.md", "*.rs", "*.sh", "*.cmake",
+            ])
+            .args(get_pathspecs_default_excludes()),
+    )?;
+    let mut missing_newline = false;
+    for path in files.lines() {
+        let mut file = File::open(path).expect("must be able to open file");
+        if file.seek(SeekFrom::End(-1)).is_err() {
+            continue; // Allow fully empty files
+        }
+        let mut buffer = [0u8; 1];
+        file.read_exact(&mut buffer)
+            .expect("must be able to read the last byte");
+        if buffer[0] != b'\n' {
+            missing_newline = true;
+            println!("{path}");
+        }
+    }
+    if missing_newline {
+        Err(r#"
+A trailing newline is required, because git may warn about it missing. Also, it can make diffs
+verbose and can break git blame after appending lines.
+
+Thus, it is best to add the trailing newline now.
+
+Please add any false positives to the exclude list.
+            "#
+        .trim()
+        .to_string())
+    } else {
+        Ok(())
+    }
+}
+
+pub fn lint_tabs_whitespace() -> LintResult {
+    let tabs = git()
+        .args(["grep", "-I", "--line-number", "--perl-regexp", "^\\t", "--"])
+        .args(["*.cpp", "*.h", "*.md", "*.py", "*.sh"])
+        .args(get_pathspecs_exclude_whitespace())
+        .status()
+        .expect("command error")
+        .success();
+    if tabs {
+        Err(r#"
+Use of tabs in this codebase is problematic, because existing code uses spaces and tabs will cause
+display issues and conflict with editor settings.
+
+Please remove the tabs.
+
+Please add any false positives, such as subtrees, or externally sourced files to the exclude list.
+            "#
+        .trim()
+        .to_string())
+    } else {
+        Ok(())
+    }
+}
+
+pub fn lint_commit_msg() -> LintResult {
+    let mut good = true;
+    let commit_hashes = check_output(git().args([
+        "-c",
+        "log.showSignature=false",
+        "log",
+        &commit_range(),
+        "--format=%H",
+    ]))?;
+    for hash in commit_hashes.lines() {
+        let commit_info = check_output(git().args([
+            "-c",
+            "log.showSignature=false",
+            "log",
+            "--format=%B",
+            "-n",
+            "1",
+            hash,
+        ]))?;
+        if let Some(line) = commit_info.lines().nth(1) {
+            if !line.is_empty() {
+                println!(
+                        "The subject line of commit hash {hash} is followed by a non-empty line. Subject lines should always be followed by a blank line."
+                    );
+                good = false;
+            }
+        }
+    }
+    if good {
+        Ok(())
+    } else {
+        Err("".to_string())
+    }
+}
diff --git a/test/lint/test_runner/src/main.rs b/test/lint/test_runner/src/main.rs
index 3a870b94..ddcdd178 100644
--- a/test/lint/test_runner/src/main.rs
+++ b/test/lint/test_runner/src/main.rs
@@ -2,13 +2,17 @@
 // Distributed under the MIT software license, see the accompanying
 // file COPYING or https://opensource.org/license/mit/.
 
+mod lint_text_format;
 mod util;
 
 use std::env;
-use std::fs::{self, File};
-use std::io::{ErrorKind, Read, Seek, SeekFrom};
+use std::fs;
+use std::io::ErrorKind;
 use std::process::{Command, ExitCode, Stdio};
 
+use lint_text_format::{
+    lint_commit_msg, lint_tabs_whitespace, lint_trailing_newline, lint_trailing_whitespace,
+};
 use util::{
     check_output, commit_range, get_git_root, get_pathspecs_default_excludes, get_subtrees, git,
     LintFn, LintResult,
@@ -187,41 +191,6 @@ fn lint_scripted_diff() -> LintResult {
     }
 }
 
-fn lint_commit_msg() -> LintResult {
-    let mut good = true;
-    let commit_hashes = check_output(git().args([
-        "-c",
-        "log.showSignature=false",
-        "log",
-        &commit_range(),
-        "--format=%H",
-    ]))?;
-    for hash in commit_hashes.lines() {
-        let commit_info = check_output(git().args([
-            "-c",
-            "log.showSignature=false",
-            "log",
-            "--format=%B",
-            "-n",
-            "1",
-            hash,
-        ]))?;
-        if let Some(line) = commit_info.lines().nth(1) {
-            if !line.is_empty() {
-                println!(
-                        "The subject line of commit hash {hash} is followed by a non-empty line. Subject lines should always be followed by a blank line."
-                    );
-                good = false;
-            }
-        }
-    }
-    if good {
-        Ok(())
-    } else {
-        Err("".to_string())
-    }
-}
-
 fn lint_py_lint() -> LintResult {
     let bin_name = "ruff";
     let checks = format!(
@@ -397,122 +366,6 @@ expected to follow the naming "/doc/release-notes-<PR number>.md".
     }
 }
 
-/// Return the pathspecs for whitespace related excludes
-fn get_pathspecs_exclude_whitespace() -> Vec<String> {
-    let mut list = get_pathspecs_default_excludes();
-    list.extend(
-        [
-            // Permanent excludes
-            "*.patch",
-            "src/qt/locale",
-            "contrib/windeploy/win-codesign.cert",
-            "doc/README_windows.txt",
-            // Temporary excludes, or existing violations
-            "contrib/init/bitcoind.openrc",
-            "contrib/macdeploy/macdeployqtplus",
-            "src/crypto/sha256_sse4.cpp",
-            "src/qt/res/src/*.svg",
-            "test/functional/test_framework/crypto/ellswift_decode_test_vectors.csv",
-            "test/functional/test_framework/crypto/xswiftec_inv_test_vectors.csv",
-            "contrib/qos/tc.sh",
-            "contrib/verify-commits/gpg.sh",
-            "src/univalue/include/univalue_escapes.h",
-            "src/univalue/test/object.cpp",
-            "test/lint/git-subtree-check.sh",
-        ]
-        .iter()
-        .map(|s| format!(":(exclude){s}")),
-    );
-    list
-}
-
-fn lint_trailing_whitespace() -> LintResult {
-    let trailing_space = git()
-        .args(["grep", "-I", "--line-number", "\\s$", "--"])
-        .args(get_pathspecs_exclude_whitespace())
-        .status()
-        .expect("command error")
-        .success();
-    if trailing_space {
-        Err(r#"
-Trailing whitespace (including Windows line endings [CR LF]) is problematic, because git may warn
-about it, or editors may remove it by default, forcing developers in the future to either undo the
-changes manually or spend time on review.
-
-Thus, it is best to remove the trailing space now.
-
-Please add any false positives, such as subtrees, Windows-related files, patch files, or externally
-sourced files to the exclude list.
-            "#
-        .trim()
-        .to_string())
-    } else {
-        Ok(())
-    }
-}
-
-fn lint_trailing_newline() -> LintResult {
-    let files = check_output(
-        git()
-            .args([
-                "ls-files", "--", "*.py", "*.cpp", "*.h", "*.md", "*.rs", "*.sh", "*.cmake",
-            ])
-            .args(get_pathspecs_default_excludes()),
-    )?;
-    let mut missing_newline = false;
-    for path in files.lines() {
-        let mut file = File::open(path).expect("must be able to open file");
-        if file.seek(SeekFrom::End(-1)).is_err() {
-            continue; // Allow fully empty files
-        }
-        let mut buffer = [0u8; 1];
-        file.read_exact(&mut buffer)
-            .expect("must be able to read the last byte");
-        if buffer[0] != b'\n' {
-            missing_newline = true;
-            println!("{path}");
-        }
-    }
-    if missing_newline {
-        Err(r#"
-A trailing newline is required, because git may warn about it missing. Also, it can make diffs
-verbose and can break git blame after appending lines.
-
-Thus, it is best to add the trailing newline now.
-
-Please add any false positives to the exclude list.
-            "#
-        .trim()
-        .to_string())
-    } else {
-        Ok(())
-    }
-}
-
-fn lint_tabs_whitespace() -> LintResult {
-    let tabs = git()
-        .args(["grep", "-I", "--line-number", "--perl-regexp", "^\\t", "--"])
-        .args(["*.cpp", "*.h", "*.md", "*.py", "*.sh"])
-        .args(get_pathspecs_exclude_whitespace())
-        .status()
-        .expect("command error")
-        .success();
-    if tabs {
-        Err(r#"
-Use of tabs in this codebase is problematic, because existing code uses spaces and tabs will cause
-display issues and conflict with editor settings.
-
-Please remove the tabs.
-
-Please add any false positives, such as subtrees, or externally sourced files to the exclude list.
-            "#
-        .trim()
-        .to_string())
-    } else {
-        Ok(())
-    }
-}
-
 fn lint_includes_build_config() -> LintResult {
     let config_path = "./cmake/bitcoin-build-config.h.in";
     let defines_regex = format!(