Skip all newlines from the output of machete-status-branch hook to …

…avoid messing up the rendered status

RELEASE_NOTES.md

@@ -4,6 +4,8 @@
 
 - fixed: git-machete crashing when a local branch uses another local branch as its remote tracking branch (`git config branch.BRANCH.remote` set to `.`)
 - fixed: fork point incorrectly inferred when a branch has been pushed immediately after being created
+- fixed: output of `help` no longer includes ANSI escape codes when stdout is not a terminal
+- fixed: all newlines are skipped from the output of `machete-status-branch` hook to avoid messing up the rendered status
 
 ## New in git-machete 3.11.3
 

git_machete/client.py

@@ -1046,7 +1046,8 @@ def print_line_prefix(branch_: LocalBranchShortName, suffix: str) -> None:
                 status_code, stdout, stderr = utils.popen_cmd(hook_path, branch, cwd=self.__git.get_root_dir(), env=hook_env)
                 if status_code == 0:
                     if not stdout.isspace():
-                        hook_output = f"  {stdout.rstrip()}"
+                        # Replace all newlines with spaces, in case the hook prints out more than one line
+                        hook_output = "  " + stdout.replace('\n', ' ').rstrip()
                 else:
                     debug("machete-status-branch hook ({hook_path}) for branch {branch} "
                           "returned {status_code}; stdout: '{stdout}'; stderr: '{stderr}'")