regex - remove whitespaces and blank spaces in next line -

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i've below piece of code.

<sup><a name="f31" href="#ftn.31" class="tr_ftn">                                 31</a></sup>

here want replace space between closing tag , number, output should below.

<sup><a name="f31" href="#ftn.31" class="tr_ftn">31</a></sup>

the regex i'm using 

 class="tr_ftn">\n*

but taking full next line.

please let me know how fix it.

thanks

i forgot how different visual studio 2010 expressions are. can use: 

class="tr_ftn"\>:wh*:cc*:wh*

that match class="tr_ftn">, followed number of spaces, number of newlines, , spaces.

if match want replace with:

class="tr_ftn">

for visual studio 2012 use match: 

class="tr_ftn">[\r\n\s]*

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