Fix two typos in x2sys_cross docstrings
Before the fix, building the documentation gives the following warnings:
```
docstring of pygmt.x2sys_cross:32: WARNING: Inline emphasis start-string without end-string.
docstring of pygmt.x2sys_cross:94: WARNING: Inline literal start-string without end-string.
```
@@ -206,8 +206,8 @@ def x2sys_cross(tracks=None, outfile=None, **kwargs):
in the current directory and second in all directories listed in
$X2SYS_HOME/TAG/TAG_paths.txt (if it exists). [If $X2SYS_HOME is not
set it will default to $GMT_SHAREDIR/x2sys]. (Note: MGD77 files will
- also be looked for via $MGD77_HOME/mgd77_paths.txt and *.gmt files will
- be searched for via $GMT_SHAREDIR/mgg/gmtfile_paths).
+ also be looked for via $MGD77_HOME/mgd77_paths.txt and \\*.gmt files
+ will be searched for via $GMT_SHAREDIR/mgg/gmtfile_paths).
outfile : str
Optional. The file name for the output ASCII txt file to store the
@@ -271,7 +271,7 @@ def x2sys_cross(tracks=None, outfile=None, **kwargs):
headings will not be computed (i.e., set to NaN) [Default calculates \
headings regardless of speed].
- For example, you can use ``speed=["l0", "u10", "h5"] to set a lower
+ For example, you can use ``speed=["l0", "u10", "h5"]`` to set a lower
speed of 0, upper speed of 10, and disable heading calculations for
speeds below 5.
