minor tweaks to catalog vignette and readme

Author: sfirke

README.Rmd

@@ -37,8 +37,8 @@ options(width = 110)
 The main janitor functions:
 
 * perfectly format data.frame column names;
-* isolate partially-duplicate records; and 
-* provide quick one- and two-variable tabulations (i.e., frequency tables and crosstabs).
+* provide quick one- and two-variable tabulations (i.e., frequency tables and crosstabs); and
+* isolate partially-duplicate records.
 
 Other janitor functions nicely format the results of these tabulations. Together, these tabulate-and-report functions approximate popular features of SPSS and Microsoft Excel.
 

README.md

@@ -15,8 +15,8 @@ janitor <img src="tools/readme/logo_small.png" align="right" />
 The main janitor functions:
 
 -   perfectly format data.frame column names;
--   isolate partially-duplicate records; and
--   provide quick one- and two-variable tabulations (i.e., frequency tables and crosstabs).
+-   provide quick one- and two-variable tabulations (i.e., frequency tables and crosstabs); and
+-   isolate partially-duplicate records.
 
 Other janitor functions nicely format the results of these tabulations. Together, these tabulate-and-report functions approximate popular features of SPSS and Microsoft Excel.
 

vignettes/introduction.Rmd

@@ -188,7 +188,7 @@ mtcars %>%
 ```
 
 ### Convert a data.frame of numbers to percentages with `ns_to_percents()`
-A helper function for `adorn_crosstab`, but can be called directly.  Takes a data.frame of numerics and returns corresponding percentages of rows, columns, or the total sum of the data.frame.  Like `prop.table`, except for data.frames, and skips the first column (which is assumed to contain a non-numeric descriptive variable).
+A helper function for `adorn_crosstab`, but can be called directly.  Takes a data.frame with at least one numeric column and returns corresponding percentages of rows, columns, or the total sum of the data.frame.  Similar to `prop.table`, but for data.frames, and skips the first column (which is assumed to contain a non-numeric descriptive variable).
 
 ```{r}
 mtcars %>%

vignettes/introduction.md

@@ -1,6 +1,6 @@
 Catalog of janitor functions
 ================
-2017-04-06
+2017-05-06
 
 -   [Major functions](#major-functions)
     -   [Cleaning](#cleaning)
@@ -271,7 +271,7 @@ mtcars %>%
 
 ### Convert a data.frame of numbers to percentages with `ns_to_percents()`
 
-A helper function for `adorn_crosstab`, but can be called directly. Takes a data.frame of numerics and returns corresponding percentages of rows, columns, or the total sum of the data.frame. Like `prop.table`, except for data.frames, and skips the first column (which is assumed to contain a non-numeric descriptive variable).
+A helper function for `adorn_crosstab`, but can be called directly. Takes a data.frame with at least one numeric column and returns corresponding percentages of rows, columns, or the total sum of the data.frame. Similar to `prop.table`, but for data.frames, and skips the first column (which is assumed to contain a non-numeric descriptive variable).
 
 ``` r
 mtcars %>%