Changed exception handling and removed whitespaces

The whitespaces which were removed and messed up the git history were
added again.
Instead of catching all exceptions, we just now just catch the
IndexError.

README.md

@@ -217,7 +217,7 @@ Beyond the pyBoard and ESP32, micropyGPS should run on other embedded platforms
 [Micropython]:https://micropython.org/
 [frozen module]:https://learn.adafruit.com/micropython-basics-loading-modules/frozen-modules
 [NMEA-0183]:http://aprs.gids.nl/nmea/
-[TinyGPS]:http://arduiniana.org/libraries/tinygps/
+[TinyGPS]:http://arduiniana.org/libraries/tinygps/ 
 [pyboard]:http://docs.micropython.org/en/latest/pyboard/pyboard/quickref.html
 [MTK_command]:https://github.com/inmcm/MTK_commands
 [Ultimate GPS Breakout]:http://www.adafruit.com/product/746

micropyGPS.py

@@ -495,32 +495,23 @@ class MicropyGPS(object):
             if self.gps_segments[sats]:
                 try:
                     sat_id = int(self.gps_segments[sats])
-                except ValueError:
-                    return False
-                except Exception:
+                except (ValueError,IndexError):
                     return False
 
                 try:  # elevation can be null (no value) when not tracking
                     elevation = int(self.gps_segments[sats+1])
-                except ValueError:
-                    elevation = None
-                except Exception:
+                except (ValueError,IndexError):
                     elevation = None
 
                 try:  # azimuth can be null (no value) when not tracking
                     azimuth = int(self.gps_segments[sats+2])
-                except ValueError:
-                    azimuth = None
-                except Exception:
+                except (ValueError,IndexError):
                     azimuth = None
 
                 try:  # SNR can be null (no value) when not tracking
                     snr = int(self.gps_segments[sats+3])
-                except ValueError:
+                except (ValueError,IndexError):
                     snr = None
-                except Exception:
-                    snr = None
-
             # If no PRN is found, then the sentence has no more satellites to read
             else:
                 break