Solution : https://service.sap.com/sap/support/notes/670254 (SAP Service marketplace login required)
Key words :
current support package, blank character disappears, blank character, blank space, equal symbol '=', tag column, subsequent line, terms sapscript, formatting reason, source code
Related Notes :
| 679716 | FORMAT_TEXTLINES: Missing spaces at the end of long line |
| 603636 | FORMAT_TEXTLINES: Missing blank character for FORMATWIDTH=13 |