Update UnitSystem.md

wiki/doc/UnitSystem.md

@@ -58,9 +58,13 @@ Description how to build units witht the D-SI format is [here](StructureSIUnits.
 |\percent<sup>(g</sup>|gold|percent|%|1|\one|[1, Sec. 5.4.7]|"
 
 <sub>(c: The unit gram must not be combined with the prefix kilo. </sub>
+
 <sub>(d: Binary prefixes are the only allowed prefixes for unit bit. </sub>
+
 <sub>(e: Binary prefixes are the only allowed prefixes for unit byte. </sub>
+
 <sub>(f: Unit ppm (parts per million) must not be used with a prefix of an exponent. </sub>
+
 <sub>(g: Unit percent must not be used with a prefix of an exponent. </sub>
 
 ## Non-SI units of measurement allowed with the SI 
@@ -77,6 +81,7 @@ Description how to build units witht the D-SI format is [here](StructureSIUnits.
 |\decibel<sup>(i</sup>|silver|decibel(b|dB|1|\one|[1, Table 8]|"
 
 <sub>(h: The unit bel must not be combined with the prefix deci. </sub>
+
 <sub>(i: The unit decibel must not be combined with any prefix. </sub>
 
 ## SI prefixes decimal
@@ -108,7 +113,9 @@ Description how to build units witht the D-SI format is [here](StructureSIUnits.
 |\quecto|gold|quecto|q|0.000000000000000000000000000001|[2, Resolution 3]|"
 
 <sub>(j: All prefixes must not be combined with the units kilogram, decibal, one, bit, and byte. </sub>
+
 <sub>(k: The prefix kilo must not be combined with the unit gram. </sub>
+
 <sub>(l: The prefix deci must not be combined with the unit bel. </sub>
 
 ## SI prefixes binary