Re-instate gtk-doc's function matching

Now that we ignore code blocks, and we have a better regular expression
for it, we can go back and turn "foo_bar()" into `foo_bar()`.
3 jobs for gtkdoc-sigils in 1 minute and 45 seconds (queued for 5 seconds)
Status Name Job ID Coverage
  Check
passed flake8 #1449901

00:01:17

failed mypy #1449902
allowed to fail

00:01:41

passed reuse #1449903

00:01:44

 
Name Stage Failure
failed
mypy Check
gidocgen/gir/parser.py:982: error: Argument "get_type" to "GType" has incompatible type "Optional[str]"; expected "str"
gidocgen/gir/parser.py:1004: error: Argument "name" to "Union" has incompatible type "Optional[str]"; expected "str"
gidocgen/gir/parser.py:1004: error: Argument "symbol_prefix" to "Union" has incompatible type "Optional[str]"; expected "str"
gidocgen/gir/parser.py:1004: error: Argument "ctype" to "Union" has incompatible type "Optional[str]"; expected "str"
gidocgen/gir/parser.py:1006: error: Argument 1 to "set_version" of "GIRElement" has incompatible type "Optional[str]"; expected "str"
gidocgen/utils.py:809: error: Need type annotation for 'found_programs' (hint: "found_programs: Dict[<type>, <type>] = ...")
Found 205 errors in 3 files (checked 17 source files)
Cleaning up file based variables
ERROR: Job failed: exit code 1