pages*: put stdin in code ticks (#14281)

pages/common/crane-export.md

@@ -11,6 +11,6 @@
 
 `crane export {{image_name}} {{path/to/tarball}}`
 
-- Read image from stdin:
+- Read image from `stdin`:
 
 `crane export - {{path/to/filename}}`

pages/common/npm-token.md

@@ -23,7 +23,7 @@
 
 `npm token create --publish`
 
-- Automatically configure an npm token in your global .npmrc file when you log in:
+- Automatically configure an npm token in your global `.npmrc` file when you log in:
 
 `npm login`
 

pages/common/npm.md

@@ -4,7 +4,7 @@
 > Manage Node.js projects and their module dependencies.
 > More information: <https://www.npmjs.com>.
 
-- Create a `package.json` file with default values (omit --yes to do it interactively):
+- Create a `package.json` file with default values (omit `--yes` to do it interactively):
 
 `npm init {{-y|--yes}}`
 

pages/common/tspin.md

@@ -15,6 +15,6 @@
 
 `tspin {{path/to/application.log}} --print`
 
-- Read from stdin and print to `stdout`:
+- Read from `stdin` and print to `stdout`:
 
 `echo "2021-01-01 12:00:00 [INFO] This is a log message" | tspin`