ret: doc: header fixes
ret: doc: header fixes

yevheniyc/Autodidact,yevheniyc/Autodidact,yevheniyc/Autodidact,yevheniyc/C,yevheniyc/Autodidact,yevheniyc/Autodidact,yevheniyc/Autodidact,yevheniyc/Autodidact,yevheniyc/Autodidact,yevheniyc/C,yevheniyc/Autodidact