DOC: Add flush=True to a few examples

Author: mgeier

README.rst

@@ -235,7 +235,7 @@ Callback "wire" with `sounddevice.Stream`:
 
    def callback(indata, outdata, frames, time, status):
        if status:
-           print(status)
+           print(status, flush=True)
        outdata[:] = indata
 
    with sd.Stream(channels=2, callback=callback):
@@ -250,7 +250,7 @@ Same thing with `sounddevice.RawStream`:
 
    def callback(indata, outdata, frames, time, status):
        if status:
-           print(status)
+           print(status, flush=True)
        outdata[:] = indata
 
    with sd.RawStream(channels=2, dtype='int24', callback=callback):

examples/spectrogram.py

@@ -85,7 +85,7 @@ def callback(indata, frames, time, status):
                     args.gain /= 2
                 else:
                     print('\x1b[31;40m', usage_line.center(args.columns, '#'),
-                          '\x1b[0m', sep='')
+                          '\x1b[0m', sep='', flush=True)
                     break
     if statuses:
         logging.warning(str(statuses))