Fix warnings xgettext gives in html5lib.

This is relatively trivially resolved by changing the bare `%s`,
`%r`, etc. into named substitutions.

Author: mikewest

html5lib/filters/lint.py

@@ -23,24 +23,24 @@ def __iter__(self):
             if type in ("StartTag", "EmptyTag"):
                 name = token["name"]
                 if contentModelFlag != "PCDATA":
-                    raise LintError(_("StartTag not in PCDATA content model flag: %s") % name)
+                    raise LintError(_("StartTag not in PCDATA content model flag: %(tag)s") % {"tag": name})
                 if not isinstance(name, str):
-                    raise LintError(_("Tag name is not a string: %r") % name)
+                    raise LintError(_("Tag name is not a string: %(tag)r") % {"tag": name})
                 if not name:
                     raise LintError(_("Empty tag name"))
                 if type == "StartTag" and name in voidElements:
-                    raise LintError(_("Void element reported as StartTag token: %s") % name)
+                    raise LintError(_("Void element reported as StartTag token: %(tag)s") % {"tag": name})
                 elif type == "EmptyTag" and name not in voidElements:
-                    raise LintError(_("Non-void element reported as EmptyTag token: %s") % token["name"])
+                    raise LintError(_("Non-void element reported as EmptyTag token: %(tag)s") % {"tag": token["name"]})
                 if type == "StartTag":
                     open_elements.append(name)
                 for name, value in token["data"]:
                     if not isinstance(name, str):
-                        raise LintError(_("Attribute name is not a string: %r") % name)
+                        raise LintError(_("Attribute name is not a string: %(name)r") % {"name": name})
                     if not name:
                         raise LintError(_("Empty attribute name"))
                     if not isinstance(value, str):
-                        raise LintError(_("Attribute value is not a string: %r") % value)
+                        raise LintError(_("Attribute value is not a string: %(value)r") % {"value": value})
                 if name in cdataElements:
                     contentModelFlag = "CDATA"
                 elif name in rcdataElements:
@@ -51,14 +51,14 @@ def __iter__(self):
             elif type == "EndTag":
                 name = token["name"]
                 if not isinstance(name, str):
-                    raise LintError(_("Tag name is not a string: %r") % name)
+                    raise LintError(_("Tag name is not a string: %(tag)r") % {"tag": name})
                 if not name:
                     raise LintError(_("Empty tag name"))
                 if name in voidElements:
-                    raise LintError(_("Void element reported as EndTag token: %s") % name)
+                    raise LintError(_("Void element reported as EndTag token: %(tag)s") % {"tag": name})
                 start_name = open_elements.pop()
                 if start_name != name:
-                    raise LintError(_("EndTag (%s) does not match StartTag (%s)") % (name, start_name))
+                    raise LintError(_("EndTag (%(end)s) does not match StartTag (%(start)s)") % {"end": name, "start": start_name})
                 contentModelFlag = "PCDATA"
 
             elif type == "Comment":
@@ -68,26 +68,26 @@ def __iter__(self):
             elif type in ("Characters", "SpaceCharacters"):
                 data = token["data"]
                 if not isinstance(data, str):
-                    raise LintError(_("Attribute name is not a string: %r") % data)
+                    raise LintError(_("Attribute name is not a string: %(name)r") % {"name": data})
                 if not data:
-                    raise LintError(_("%s token with empty data") % type)
+                    raise LintError(_("%(type)s token with empty data") % {"type": type})
                 if type == "SpaceCharacters":
                     data = data.strip(spaceCharacters)
                     if data:
-                        raise LintError(_("Non-space character(s) found in SpaceCharacters token: ") % data)
+                        raise LintError(_("Non-space character(s) found in SpaceCharacters token: %(token)r") % {"token": data})
 
             elif type == "Doctype":
                 name = token["name"]
                 if contentModelFlag != "PCDATA":
-                    raise LintError(_("Doctype not in PCDATA content model flag: %s") % name)
+                    raise LintError(_("Doctype not in PCDATA content model flag: %(name)s") % {"name": name})
                 if not isinstance(name, str):
-                    raise LintError(_("Tag name is not a string: %r") % name)
+                    raise LintError(_("Tag name is not a string: %(tag)r") % {"tag": name})
                 # XXX: what to do with token["data"] ?
 
             elif type in ("ParseError", "SerializeError"):
                 pass
 
             else:
-                raise LintError(_("Unknown token type: %s") % type)
+                raise LintError(_("Unknown token type: %(type)s") % {"type": type})
 
             yield token