fix(E501) Break long strings in logger.warning calls

Fixes two E501 (line-too-long) errors by breaking string literals
across multiple lines using implicit string concatenation:
- docs/_ext/aafig.py:134
- src/tmuxp/workspace/builder.py:421

All checks now pass:
✅ ruff check: All checks passed!
✅ mypy: Success
✅ pytest: 204 passed, 3 skipped

Author: tony

docs/_ext/aafig.py

@@ -131,7 +131,10 @@ def render_aafig_images(app: Sphinx, doctree: nodes.Node) -> None:
             options["format"] = format_map[format_]
         else:
             logger.warning(
-                'unsupported builder format "%s", please add a custom entry in aafig_format config option for this builder',
+                (
+                    'unsupported builder format "%s", please add a custom entry in '
+                    "aafig_format config option for this builder"
+                ),
                 format_,
             )
             img.replace_self(nodes.literal_block(text, text))

src/tmuxp/workspace/builder.py

@@ -418,7 +418,10 @@ def iter_create_windows(
                 else:
                     target = "windows"
                 logger.warning(
-                    "Cannot set environment for new %s. You need tmux 3.0 or newer for this.",
+                    (
+                        "Cannot set environment for new %s. "
+                        "You need tmux 3.0 or newer for this."
+                    ),
                     target,
                 )
                 environment = None