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Code-blocks with line nos - lines and line numbers don't line up. #419

TonyFlury opened this issue May 3, 2017 · 2 comments


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commented May 3, 2017

Using the rtd Theme with this source :

.. code-block:: python

    import tkinter as tk
    root = tk.Tk()
    w = tk.Label(root, text='Hello, world!')

The resultant rendered page has this :



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commented May 3, 2017

It seems to be that the line nos are rendered with a line height of 1.5 - and generated html seems to also state the same line height value for the code, but there seems to be a clash between the line heights set in the theme :

These two CSS rules get appled to the code block

.rst-content .highlight > pre {
line-height: normal;

and :

 div[class^="highlight"] pre {
     line-height: 1.5;

but the line-height: normal; takes precedence; changing the line-height value in the first rule results in correctly aligining line nos and code.

return42 added a commit to return42/sphkerneldoc that referenced this issue Jun 15, 2017

CSS theme: fixed a line-height missmatch in RTD theme.
ref:  readthedocs/sphinx_rtd_theme#419

Signed-off-by: Markus Heiser <>

return42 added a commit to return42/boilerplate that referenced this issue Jun 15, 2017

RTD theme: readthedocs/sphinx_rtd_theme#419
Signed-off-by: Markus Heiser <>

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commented Jun 19, 2017

This is a duplicate of #417

@Blendify Blendify closed this Jun 19, 2017

ColinIanKing pushed a commit to ColinIanKing/linux-next-mirror that referenced this issue Jul 18, 2017

docs RTD theme: code-block with line nos - lines and line numbers don…
…'t line up.

In a code-block with line numbers (option :lineno:) there is a
misalignment of the rendered source code lines on the right side and the
line numbers on the left side.


Since this issue is reported to the RTD theme project, it might be fixed
in the future (take this as a interim solution).

Signed-off-by: Markus Heiser <>
Signed-off-by: Jonathan Corbet <>
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