Update warning on --text flag to make it more clear

[emmadickson]

No description provided.

[codecov]

Codecov Report

Merging #50 (53daed3) into master (61123ce) will increase coverage by 0.04%.
The diff coverage is n/a.

@@            Coverage Diff             @@
##           master      #50      +/-   ##
==========================================
+ Coverage   88.56%   88.60%   +0.04%     
==========================================
  Files           5        5              
  Lines         507      509       +2     
==========================================
+ Hits          449      451       +2     
  Misses         58       58              

Impacted Files	Coverage Δ
wacz/waczindexer.py	89.14% <0.00%> (+0.09%)	⬆️

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