Update README.md

README.md

@@ -9,13 +9,13 @@ capitalization, earnings, price/earnings ratio, price to book etc.
 Information on S&P 500 index used to be available on the [official webpage on the Standard and Poor's website][sp-home]
 but until they publish it back, Wikipedia is the best up-to-date and open data source.
 
-* Index listing - see "data/constituents.csv" extracted from Wikipedia's [SP500 list of companies][sp-list]
-* Constituent financials - see "data/constituents-financials.csv" (source via Yahoo Finance)
+* Index listing - see `data/constituents.csv` extracted from Wikipedia's [SP500 list of companies][sp-list]
+* Constituent financials - see `data/constituents-financials.csv` (source via Yahoo Finance)
 
 Detailed information on the S&P 500 (primarily in XLS format) used to be obtained
 from its [official webpage on the Standard and Poor's website][sp-home] - it was
 free but registration was required.
-* Index listing - see <data/constituents.csv> used to be extracted from [source Excel file on S&P website][sp-listing-dec-2014] (Note this Excel is actually S&P 500 EPS 
+* Index listing - see `data/constituents.csv` used to be extracted from [source Excel file on S&P website][sp-listing-dec-2014] (Note this Excel is actually S&P 500 EPS 
    estimates but on sheet 4 it has list of members - [previous file][sp-lsting]
    was just members but that 404s as of Dec 2014) (Note: <del>but note you have
    to register and login to access</del> - no longer true as of August 2013)