No line numbers in Eclipse or Android Studio XML editor

Question

When editing XML files in the editor for Eclipse, line numbers are not displayed.

Use case:

I create a layout with many views, one of these lacks android:layout_

Answer 1

Dec 2013: Starting with Eclipse 4.4, you won't have to look for an option to see line numbers, because they will be visible by default.

Regarding Android Studio, this is another story: since May 2013, Android Studio 0.3.x+ is based on IntelliJ IDEA.
See "How can I permanently have line numbers in IntelliJ?".

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Lars Vogel just published on his blog:

Line numbers are default in Eclipse SDK Luna (4.4) as of today

(December 10, 2013)

We conducted a user survey if users want to have line numbers activated in text editors in the Eclipse IDE by default.
The response was very clear:

YES : 80.07% (1852 responses)
NO  : 19.93% (461 responses)
Total  : 2313
Skipped:   15

With Bug 421313, Review - Line number should be activated by default, we enabled it for the Eclipse SDK build, I assume other Eclipse packages will follow.