benchmarks/linux-unigine-*: minor, non-functional textual nits

- Elaborate two comments about why we are renaming the scripts
- Consistently pad the paragraph heading from its body text in
  the provided license file

benchmarks/linux-unigine-sanctuary/Makefile

@@ -23,7 +23,7 @@ do-extract:
 	@${TAIL} -n 107856 ${DISTDIR}/${DISTFILES} | ${TAR} xzf - -C ${WRKSRC}
 
 post-patch:
-# Avoid clash with other Unigine benchmarks
+# Rename the scripts to avoid the clash with other Unigine benchmarks
 .for script in 1024x768_windowed 1920x1080_fullscreen
 	@${SED} -e 's,\./bin,${DATADIR}/bin,' ${WRKSRC}/${script}.sh \
 		> ${WRKSRC}/${PORTNAME}_${script}.sh

benchmarks/linux-unigine-superposition/pkg-license

@@ -3,6 +3,7 @@ Superposition Benchmark End-User License Agreement
 IMPORTANT - READ CAREFULLY: This End-User License Agreement ("EULA") is a legal agreement between you (either an individual or a single entity, hereinafter referred as to the "User") and UNIGINE HOLDING S.à r.l. (hereinafter referred as to the "Developer") for software product "Unigine Superposition Benchmark" (hereinafter referred as to the "Software Product"). If you are accepting the terms of this EULA on behalf of a legal entity, you represent and warrant that you have the authority to bind that legal entity to the terms of this Agreement, and, in such event, "you" and "your" will refer to that legal entity. Through downloading, installing, copying or using the Software Product you are expressing your consent to these EULA.
 
 1. Editions
+
 The Software Product is available in three editions: Basic, Advanced and Pro. Some terms are different for different editions, as marked in this EULA. Advanced and Pro editions can be unlocked after installation of Basic edition by entering a special license key.
 
 2. Grant of License

benchmarks/linux-unigine-tropics/Makefile

@@ -23,7 +23,7 @@ do-extract:
 	@${TAIL} -n 211448 ${DISTDIR}/${DISTFILES} | ${TAR} xzf - -C ${WRKSRC}
 
 post-patch:
-# Avoid clash with other Unigine benchmarks
+# Rename the scripts to avoid the clash with other Unigine benchmarks
 .for script in 1024x768_windowed 1920x1080_fullscreen
 	@${SED} -e 's,\./bin,${DATADIR}/bin,' ${WRKSRC}/${script}.sh \
 		> ${WRKSRC}/${PORTNAME}_${script}.sh