diff --git a/pre_commit_hooks/check_docstring_first.py b/pre_commit_hooks/check_docstring_first.py
index 1744919..d55f08a 100644
--- a/pre_commit_hooks/check_docstring_first.py
+++ b/pre_commit_hooks/check_docstring_first.py
@@ -28,13 +28,13 @@
         if tok_type == tokenize.STRING and scol == 0:
             if found_docstring_line is not None:
                 print(
-                    f'{filename}:{sline} Multiple module docstrings '
+                    f'{filename}:{sline}: Multiple module docstrings '
                     f'(first docstring on line {found_docstring_line}).',
                 )
                 return 1
             elif found_code_line is not None:
                 print(
-                    f'{filename}:{sline} Module docstring appears after code '
+                    f'{filename}:{sline}: Module docstring appears after code '
                     f'(code seen on line {found_code_line}).',
                 )
                 return 1
diff --git a/pre_commit_hooks/check_merge_conflict.py b/pre_commit_hooks/check_merge_conflict.py
index 22031a2..15ec284 100644
--- a/pre_commit_hooks/check_merge_conflict.py
+++ b/pre_commit_hooks/check_merge_conflict.py
@@ -10,6 +10,7 @@
 CONFLICT_PATTERNS = [
     b'<<<<<<< ',
     b'======= ',
+    b'=======\r\n',
     b'=======\n',
     b'>>>>>>> ',
 ]
@@ -39,12 +40,12 @@
     retcode = 0
     for filename in args.filenames:
         with open(filename, 'rb') as inputfile:
-            for i, line in enumerate(inputfile):
+            for i, line in enumerate(inputfile, start=1):
                 for pattern in CONFLICT_PATTERNS:
                     if line.startswith(pattern):
                         print(
-                            f'Merge conflict string "{pattern.decode()}" '
-                            f'found in {filename}:{i + 1}',
+                            f'{filename}:{i}: Merge conflict string '
+                            f'{pattern.strip().decode()!r} found',
                         )
                         retcode = 1
 
diff --git a/pre_commit_hooks/debug_statement_hook.py b/pre_commit_hooks/debug_statement_hook.py
index 00b6798..9ada657 100644
--- a/pre_commit_hooks/debug_statement_hook.py
+++ b/pre_commit_hooks/debug_statement_hook.py
@@ -65,7 +65,7 @@
     visitor.visit(ast_obj)
 
     for bp in visitor.breakpoints:
-        print(f'{filename}:{bp.line}:{bp.col} - {bp.name} {bp.reason}')
+        print(f'{filename}:{bp.line}:{bp.col}: {bp.name} {bp.reason}')
 
     return int(bool(visitor.breakpoints))