Resolve invalid escape sequence '\.' warnings

src/east/__main__.py

@@ -96,7 +96,7 @@ def cli(ctx, echo):
     \b
     \n\nWant to learn what each command does?
 
-    Run [bold]east \[command] --help[/] to show documentation for that command.
+    Run [bold]east \\[command] --help[/] to show documentation for that command.
 
     \b
     \n\nNote that commands are split into two groups:

src/east/helper_functions.py

@@ -266,7 +266,7 @@ def dir_find(root, west_board):
     files = os.listdir(board_dir)
 
     # Find all files with west board name, no matter the version
-    pattern = f"^{west_board}_[0-9]?[0-9]?_[0-9]?[0-9]?_[0-9]?[0-9]?\.conf"
+    pattern = rf"^{west_board}_[0-9]?[0-9]?_[0-9]?[0-9]?_[0-9]?[0-9]?\.conf"
     matches = [file for file in files if re.match(pattern, file)]
 
     # Extract hardware versions and put them into format expected by the west.

src/east/workspace_commands/codechecker_helpers.py

@@ -132,14 +132,15 @@ def var_never_read_before_disabled_macro_found(files, diag):
         "unused variable '(.*)'",
     ]
 
+    var = None
     for desc_regex in desc_regexes:
         hit = re.search(desc_regex, diag["description"])
         if hit:
             # Extracted variable name
             var = hit.group(1)
             break
 
-    if not hit:
+    if not var:
         return False
 
     # A hit was found, locate the file where the diagnostic was found
@@ -154,8 +155,8 @@ def var_never_read_before_disabled_macro_found(files, diag):
             # If you hit a line where variable is passed to __ASSERT* or LOG_* macro,
             # then this is a false positive, and should be removed
             patterns = [
-                f".*__ASSERT.*\(.*{var}.*,.*",
-                f".*LOG_.*\(.*,.*{var}.*",
+                rf".*__ASSERT.*\(.*{var}.*,.*",
+                rf".*LOG_.*\(.*,.*{var}.*",
             ]
 
             for pattern in patterns: