highlighter_processor: add text is none condition

Author: gr4viton

CHANGELOG.md

@@ -1,5 +1,10 @@
 # CHANGELOG
 
+## 0.3.0 (2020-07-08)
+
+ - Fix SyntaxHighlighter - skip code highlighting when there is no code to highlight.
+
+
 ## 0.2.0 (2020-07-08)
 
  - Fix JSONPrettifier, XMLPrettifier - skip code coloring when there is no code to color.

setup.py

@@ -15,7 +15,7 @@
 
 setup(
     name='structlog-pretty',
-    version='0.2.0',
+    version='0.3.0',
     url='https://github.com/underyx/structlog-pretty',
     author='Bence Nagy',
     author_email='[email protected]',

structlog_pretty/processors.py

@@ -169,6 +169,8 @@ def __call__(self, _, __, event_dict):
                 code = event_dict[field]
             except KeyError:
                 continue
+            if not code:
+                continue
             event_dict[field] = highlight(code, lexer, TerminalFormatter())
 
         return event_dict