Fix typo: Add missing space after comma in CSS appearance docs (#42413)

Fix typo: Add missing space after comma in CSS appearance property docs

Fixes #42381 - Added missing space between 'on,' and 'the' in the Basic example Results section.

Author: AbhishekGiri04

files/en-us/web/css/reference/properties/appearance/index.md

@@ -238,7 +238,7 @@ We set the element with the class of `text` to look like a text field.
 
 {{EmbedLiveSample("Basic example", 600, 100)}}
 
-Depending on the browser, the spinner may be visually removed when the control is set to look like a text field. The `appearance` property has no effect on the functionality: for example, while there may no longer be a spinner to click on,the up and down cursor keys will still increment and decrement the value.
+Depending on the browser, the spinner may be visually removed when the control is set to look like a text field. The `appearance` property has no effect on the functionality: for example, while there may no longer be a spinner to click on, the up and down cursor keys will still increment and decrement the value.
 
 ### Appearance set to `none`