Applying the multiple file extension convention (#965)

- Xref- https://github.com/tldr-pages/tldr/issues/478

pages/common/mount.md

@@ -6,9 +6,9 @@
 
 `mount`
 
-- Mount a device:
+- Mount a device to a directory:
 
-`mount -t {{filesystem_type}} {{path_to_device_file}} {{directory_to_mount_to}}`
+`mount -t {{filesystem_type}} {{path/to/device_file}} {{path/to/target_directory}}`
 
 - Mount a CD-ROM device (with the filetype ISO9660) to /cdrom (readonly):
 

pages/common/sass.md

@@ -4,16 +4,16 @@
 
 - Output converted file to stdout:
 
-`sass {{inputfile.(scss|sass)}}`
+`sass {{inputfile.scss|inputfile.sass}}`
 
 - Immediately convert SCSS or Sass file to CSS to specified output file:
 
-`sass {{inputfile.(scss|sass)}} {{outputfile.css}}`
+`sass {{inputfile.scss|inputfile.sass}} {{outputfile.css}}`
 
 - Watch SCSS or Sass file for changes and output or update CSS file with same filename:
 
-`sass --watch {{inputfile.(scss|sass)}}`
+`sass --watch {{inputfile.scss|inputfile.sass}}`
 
 - Watch SCSS or Sass file for changes and output or update CSS file with specified filename:
 
-`sass --watch {{inputfile.(scss|sass)}}:{{outputfile.css}}`
+`sass --watch {{inputfile.scss|inputfile.sass}}:{{outputfile.css}}`

pages/common/x_x.md

@@ -4,11 +4,11 @@
 
 - View an XLSX or CSV file:
 
-`x_x {{file.ext}}`
+`x_x {{file.xlsx|file.csv}}`
 
 - View an XLSX or CSV file, using the first row as table headers:
 
-`x_x -h {{0}} {{file.ext}}`
+`x_x -h {{0}} {{file.xlsx|file.csv}}`
 
 - View a CSV file with unconventional delimiters: