fix(config): Calculate value offset correctly

I need unit tests :/

epicardium/modules/config.c

@@ -146,7 +146,8 @@ static void trim(char *str)
 // parses one line of the config file
 static void parse_line(char *line, int line_number, size_t line_offset)
 {
-	char *line_start = line;
+	char *line_start  = line;
+	char *value_start = strchr(line, '=') + 1;
 
 	trim(line);
 
@@ -190,7 +191,7 @@ static void parse_line(char *line, int line_number, size_t line_offset)
 		return;
 	}
 
-	size_t value_offset = value - line_start + line_offset;
+	size_t value_offset = value_start - line_start + line_offset;
 
 	add_config_pair(key, value, line_number, value_offset);
 }
@@ -617,7 +618,7 @@ int epic_config_set_string(const char *key, const char *value_in)
 			}
 		}
 
-		complex_out:
+	complex_out:
 		if (fd1 >= 0) {
 			epic_file_close(fd1);
 		}
@@ -634,7 +635,7 @@ int epic_config_set_string(const char *key, const char *value_in)
 		}
 	}
 
-	out:
+out:
 	/* Reload config so the new key or the changed value is available */
 	load_config();