Updated NEWS.md and tests.Rraw

Author: AntonNM

NEWS.md

@@ -133,7 +133,7 @@ rowwiseDT(
 
 19. An integer overflow in `fread()` with lines longer than `2^(31/2)` bytes is prevented, [#6729](https://github.com/Rdatatable/data.table/issues/6729). The typical impact was no worse than a wrong initial allocation size, corrected later. Thanks to @TaikiSan21 for the report and @aitap for the fix.
 
-20. By reference assignments (':=') with functions that modify the data.table by reference e.g. (`foo=function(DT){DT[,b:=1L];return(2L)}`, `DT[,a:=foo(DT)]`) returned a mallformed data.table due to the the modification of the targeted named column ("a") index before and after the j expression evaluation. Thanks @AntonNM for the the report and fix.
+20. By reference assignments (':=') with functions that modified the data.table by reference e.g. (`foo=function(DT){modify(DT);return(1L)}`, `DT[,a:=foo(DT)]`) returned a mallformed data.table due to the modification of the targeted named column index ("a") during the j expression evaluation. Thanks @AntonNM for the report and fix.
 
 ## NOTES
 

inst/tests/tests.Rraw

@@ -21068,5 +21068,7 @@ test(2305, { fread(testDir("issue_6729.txt.bz2")); TRUE })
 # j expressions that modify a data.table by reference, (#6768)
 inner=function(dt){dt[,b:=4:6]}
 outer=function(dt){inner(dt); return(7:9)}
+foo=function(dt){dt[b:=4:6];return(7:9)}
 DT = data.table(a=1:3)
 test(2306, DT[,c:=outer(DT)], data.table(a=1:3, b=4:6, c=7:9))
+test(2306.1, DT[,c:=foo(DT)], data.table(a=1:3, b=4:6, c=7:9))