fix: Improve error message when a scan fails (#19)

Also syncs somewhat better with the latest release of mkdocs-simple-plugin
  and corrects some typos.

Co-authored-by: Glen Whitney <glen@studioinfinity.org>
Reviewed-on: #19

mkdocs_semiliterate/plugin.py

@@ -420,8 +420,7 @@ semiliterate.ensurelines
         from_file_path = os.path.join(from_directory, from_file)
         try:
             with open(from_file_path) as original_file:
-                utils.log.debug(
-                    "mkdocs-simple-plugin: Scanning {}...".format(from_file))
+                utils.log.debug(f"mkdocs-semiliterate: Scanning {from_file}...")
                 # extraction = StreamExtract(
                 extraction = StreamInclusion(
                     input_stream=original_file,
@@ -432,7 +431,8 @@ semiliterate.ensurelines
                     patterns=self.patterns,
                     **kwargs)
                 return extraction.extract()
-        except BaseException:
-            utils.log.error("mkdocs-simple-plugin: could not build {}".format(
-                from_file_path))
+        except BaseException as error:
+            utils.log.error(
+                f"mkdocs-semiliterate: could not build {from_file_path}:\n  "
+                + str(error))
         return False