minor grammar fixes in comments

Author: ptroja

combine_delta.c

@@ -26,12 +26,12 @@
  * Source Combiner based on delta-pdfs
  * ===================================
  *
- * The basic principle here is that sources gives us four values:
- *   - The highest low value were the probability is zero.
- *   - The lowest high value were the probability is zero.
+ * The basic principle here is that sources give us four values:
+ *   - The highest low value where the probability is zero
+ *   - The lowest high value where the probability is zero
  *   - The most probable value
  *   - The relative trust in that value [0...1]
- * Together this defines a triangular probability density function.
+ * Together these define a triangular probability density function (pdf).
  *
  * The combiner adds all these pdfs' together weighted by trust
  * and finds the highest probability which sports a quorum.

time_unix.c

@@ -27,7 +27,7 @@
  * =============
  *
  * Implement the timebase functions on top of a modern UNIX kernel which
- * has the some version of the Mills/Kamp kernel PLL code and either
+ * has some version of the Mills/Kamp kernel PLL code and either
  * [gs]ettimeofday(2) or better: clock_[gs]ettime(2) API.
  *
  */