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In this lecture as we are already printing alliance with Iran without any issue we can put in alliance

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with space issues so we can write after checking if the line is any space stop issue.

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Print number of line which has some SRU.

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Basically if the code goes here this line needs to have some issue.

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I remember on continue command which would jump on another loop with no space or issue is found.

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So we are printing a line number of a line with some issue

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and this outpolled also needs to be redirected to our temporary file.

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Now vote we need to do.

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We need to put in on the same line as the baseline number spaces and taps as a red background at the

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beginning of line.

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So we are just writing comment about that.

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And we also mean on the same line but print part of line which is correct which doesn't have any space

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stops at the beginning and at the end of line

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and we also need to bring on this same line spaces and tabs as edit the ground which are at the end

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of line.

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So now how to put in spaces and tabs as a red background at the beginning of our line forget the evil

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use bash regular expression.

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So just now create a variable called Ixtapa which is Wrex for imaging spaces or tabs at the beginning

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of a line

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and remember that the beshe uses extended regular expression.

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So it is slightly different from what we have seen in the set command which uses basic Regla expression

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and also create a variable called Reg X and which matches spaces and tabs at the end of the line.

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So not is dead here in extended regular expression we are not using backslash before plus symbol.

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Now we can for space issues at the beginning of a line.

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Ask if Kickstarter variable matches our line.

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And if yes if a registered variable matches our line we know that we have space issues at the beginning

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of a line.

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So now we need that part which matches I guess we need to put that part into a red background.

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So use eco commom we eat and an barometer e barometer will allow us to use and interpret special characters.

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For example it's TransFair backslash the

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left bracket 41 and into red background.

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So everything we now print will be in red background so we can print value of variable Bircher image

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because this matches all spaces and tabs at the beginning of a line and we can finish with back sealife

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the left bracket 49 M which means default background this output we can detect of course to our temporary

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file.

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So one time more we asked if our lines match use regular expression QuickStart.

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And even as we know that dedi space or top issue at the beginning of our line.

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So we are taking a dead wrong space apart from the beginning and putting it into red background so we

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tested

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I can see on the first line only someone had a background grade.

41
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When I fix it using the forum either I don't see any red background good we can get no errors here.

42
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Well then we add a few spaces stops at the beginning.

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So open our test file and up a few spaces or tabs and the beginning of some line and some spaces also

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in another line.

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And also some top now now you can save this file and then rejected by our script.

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We see her in the background only in lines which are very edited.

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Great but we don't see here what is space and what post-up so we can definitely make it more visible

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in following questions.