add period

Author: Susan Vanderplas

part-gen-prog/02-prog-functions.qmd

@@ -151,7 +151,7 @@ F | F | F | F | T | T | F
 
 : Truth table for each of the common logical operators. {#tbl-truth-general}
 
-When writing code, we use the logical operators in R and Python shown in @tbl-log-operators
+When writing code, we use the logical operators in R and Python shown in @tbl-log-operators.
 
 Operation | R | Python
 and | `&` | `&` or `and`