[PATCH 07/11] docs/driver-api: Replace a comma in the n_gsm.rst with a double colon

Fix warning as:

linux-next/Documentation/driver-api/serial/n_gsm.rst:23: WARNING: Definition list ends without a blank line; unexpected unindent.
linux-next/Documentation/driver-api/serial/n_gsm.rst:100: WARNING: Definition list ends without a blank line; unexpected unindent.
linux-next/Documentation/driver-api/serial/n_gsm.rst:115: WARNING: Inline emphasis start-string without end-string.
linux-next/Documentation/driver-api/serial/n_gsm.rst:118: WARNING: Inline emphasis start-string without end-string.
linux-next/Documentation/driver-api/serial/n_gsm.rst:120: WARNING: Inline emphasis start-string without end-string.
linux-next/Documentation/driver-api/serial/n_gsm.rst:122: WARNING: Inline emphasis start-string without end-string.
linux-next/Documentation/driver-api/serial/n_gsm.rst:125: WARNING: Inline emphasis start-string without end-string.
linux-next/Documentation/driver-api/serial/n_gsm.rst:139: WARNING: Inline emphasis start-string without end-string.

Signed-off-by: Yanteng Si <redacted>
---
 Documentation/driver-api/serial/n_gsm.rst | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/Documentation/driver-api/serial/n_gsm.rst b/Documentation/driver-api/serial/n_gsm.rst
index 4fca5b16a0f3..90f222dc0d37 100644
--- a/Documentation/driver-api/serial/n_gsm.rst
+++ b/Documentation/driver-api/serial/n_gsm.rst

@@ -104,7 +104,7 @@ How to use it
 
   2.3 configure the mux using GSMIOC_GETCONF / GSMIOC_SETCONF ioctl.
 
-  2.4 obtain base gsmtty number for the used serial port,
+  2.4 obtain base gsmtty number for the used serial port::
 
     #include <stdio.h>
     #include <stdint.h>

-- 
2.27.0